1 files changed, 29 insertions, 0 deletions
diff --git a/src/net/tcpsockopt_darwin.go b/src/net/tcpsockopt_darwin.go
new file mode 100644
index 000000000..1f1609088
--- /dev/null
+++ b/src/net/tcpsockopt_darwin.go
@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+const sysTCP_KEEPINTVL = 0x101
+
+func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
+	if err := fd.incref(); err != nil {
+		return err
+	}
+	defer fd.decref()
+	// The kernel expects seconds so round to next highest second.
+	d += (time.Second - time.Nanosecond)
+	secs := int(d.Seconds())
+	switch err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, sysTCP_KEEPINTVL, secs); err {
+	case nil, syscall.ENOPROTOOPT: // OS X 10.7 and earlier don't support this option
+	default:
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE, secs))
+}